The following arc b~usic structures at the Pavlovo hydroproject: a right-bank channel hydraulicked dam withĪ core formed from fine-grain sand. In constructing the grout curtain, we driUed 123,200 meters of holes and used 38,300 tons of cement (49,700 Of the thrust front is 1,300 m with a maximmn grouting depth to 83 m from the low water level in the river, and an The overall length of the grout curtains in the foundation bed and areas bordering tile structures 2 heel of the left-bank dam, in the foundation bed of the apron tooth, and the karst cavity in Respectively, was built to prevent possible filtration from the reservoir over the entire length of tile structures, exceptįor the section where the channel had been deepened in the past in the area of the left-bank dam between stationsĪdditional grout curtains were iiLstalled beneath the left-bank retaining wall of the lower pool, in the foundation bed of the No. Which continues for 256 and 350 m beyond the limits of the structures in the directions of the right and left banks, Was the need for the first time in domestic practice to conduct serious anti-filtration work. One of the basic characteristic features of the Pavlovo hydroelectric plant, which were dictated by the l~'~rst, Rocks (Kakhovka, Kegum, and Narva hydroelectric plants), it wa,s done to the extent that the lalrst did not becomeĪ factor determining the basic trends in the composition of geologic-engineering investigations and design solutions. Placing them beyond their excursion into the river valley (Shaori and Tkibuli hydroelectric plants), or if tied to these Structures of other hydroprojects built in karstic regions arc either not tied directly to the lalrstic rocks, The concrete structures of the Pavlovo hydroproject are situated on the limestones, and are embedded into TheyĪre filled with clay and crystalline calcite. Of k arst cavities and channels Ires occurred as a result of ground-water movement along cracks in the rocks. Karst manifestations are expressed in the form of caves, flmnels, caverns, and karst cavities.
The width of the cracks dc<~reases with increasing Tile weatheringĬracks are heavily developed in the first 12-15 m from the surface. Shearing of the carbonate rocks in the valley edges ~ks a result of gravitational and tectonic stresses. The formation of cleavage (unloading) cracks is associated with Theĭistance between stratification cracks is 40-60 cm. Jointing cracks are nearly horizontal, and together with tile tectonic cracks, divide the rock into parallel blocks. The tectonic cracks pro('eed in two basic steeply dipping nmtually perpendicular directions, one of whichĬoincides with the direction of the axis of the ttn'ust structures, and the other with the direction of the channel. subdivided into theįollowi~lg classes: tectonic cracks, jointing ('racks, cleavages', and weathering cracks. The bedrock is characterized by heavy jointing, and is highly karstic.
is situatedĪlong the left slope beneath the alluvial deposits. M below the modern channel and is filled with slightly pernmalfle Tertiary clays and fine-grained sand.
Lower Permian laminated limestones lie below to an appreciable depth. The alluvium is up to 1(1 m deep, while the channel portion is 1.5-2.0 With a sandy or sandy-loam/cla.vey-loam filler. The bottomland deposits consist of a gravel-rubble mkxture Region of the southwestern terminus of the Ufa Plateau. The structares of the Pavlovo hydroelectric plant are located oil the Ufa River i77 kilt from its mouth in the The Pavlovo hydroelectric power plant was the first large-scale (lomestic hydroelectric power plant built underĬ()mplex geologic conditions on highly karstic limestone rock.
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